I LOVE Quinoa as do my birds! It is the only grainy pasta-y thing that all three will eat happily.
My fav recipe for it is to cook the quinoa (organic) with 1/2 cup organic chicken broth and 1 1/2 cup water to 1 cup quinoa.
Add a bag of mixed frozen organic veggies (green beans, corn, peas and carrots) a 1/4 bag of frozen organic broccoli.
Then, because my fids like curry (and so do I) I mix in curry paste to taste.
The final result is a highly tasty dish for both you and you birds!
Quinoa is high in protein (16.2%), with an amino acid balance close to ideal for humans.
There is an interesting nutrition comparison chart here:
http://www.quinoa.net/Nutrition_Facts/nutrition_facts.htmlThis is only for the Ancient Grain brand though (although I prefer that one over others).
Quinoa is also pretty cheap at just $2.99 a pound for organic in the bulk section.
But as you do have a bird with liver problems, I would drop a call to your vet for advice